Model for Dictionary decoding

DictionaryDecoding.swift

struct Spaceship: Codable {
    var model: String
    var movie: String
}

//...
let jsonDecoder = JSONDecoder()

do {
    let spaceships = try jsonDecoder.decode([String: Spaceship].self, from: jsonData!)
    spaceships.forEach({ print("\($0.key): \($0.value)") })
} catch {
    print("parse error")
}